<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>13.关于变量与值</title>
  </head>
  <body>
    <script type="text/javascript" >
      let A = function Qwe(){}

      let x = new A()
      
      console.log(x)
    </script>
  </body>
</html>